Nut-lock.



s. M. T. BARCLAY.

NUT LOGK' APPLIOATION FILED MAY 17,1911.

7 4 5* Jam 2402/17. Zfiaroday ha elt, ie this character embodying novel form of spring washer member having a free spring (if-Fig. 2. Fig. 41- is an inverted new and T useful I samunn M. '1'; BARCLAY, onnu'nois rnnusrnvnmm lioc'ks; oft which the following is a speoifi cation. g I g I Tliis'invention relates to nut looks, and to; provide} a device of p,ort1on bQel'ihg-against the nut tohold the same in.- its adjusted position. on the bolt,

*' the oipositeiendjportion of the washer being formed to' "t'u he embedded in'thefobject with which provide an I anchoring spur theholtengaged. I h I the drawlng, for lng a portion of'thls "ifi'cati'on and in; which jllke numerals of reierence indicate similar par-ts in the several viewsz- -Figure -l is a side "elevation of a portion of a rail joint showing a retain belt applied thereto and equipped with iuv'jimproved nut lock... the nut being tad.

1 showing 'thenut in an applied posit: Fim,3-"1s a? section on line 3-3- perspective view of the locking washer. F g. 5' is an edge view thereof. 7 improved nut lock whilebeing designed; for use on various forms of machinery or the like is principally designed asherein shown for attachment to the .re.-'

"taining bolt ofthe rail joint 13.3 "The rail joint is of common construction, being pro. vided with the usual. fish plates" which are arranged atthe sides of" the vertical webs of the rail e1 The belt 1 is extended through the plates and through the rail, and as shov. it is threaded. at one end to adjustably rei'seive the retaining or clamping nut 2. This nut is substantially "of common configuration and on its inner surface it is formed to provide curved abut ment or gripping surfaces 3, the adjacent faces. being extended .in T opposite directions and terminatisrsg at their ends substantially on lines drawn radially through -.the axis of the nut and through the points of intersection of the side faces of the nut as clearly shown in the drawing. The locking washerdis formed? preferably from a single strip flat 1 spring; Steel bent sub- STATESPATENT oerion. v

I NUT-LOCK. 1

Specification of Letters Patent. Applicatidnfiled llay 17', 1911.

peripherally; 'beyond th form a relativeljz sharp the ilsh faces )8 and 9 washer-plate, is increased, a V provide a relatively pointed-too Fig. 2 is aeec'tion on line 2+2 a e e. are

P Pa i s .5' nd the ifi l d an. t c-n 6. The gancho-ringjporti loi and at its" extremity it .pth tt the object withvwhich the bolt lfisiengag In the present inst-ance,thetoo'th7 engages plate r the u, joint t an is-tad associated therewith so as togbe posi ely retained against rotation, Th' fre -portion of the washerfpla L is for Y its outer surface to prdvide t. curved relatively broad and ,long

and at section of these, faces th th 10 to be engaged in the recesses 11 which are formed between the surfaces 3 of the nut.

The steel strip forming the washer is preferably tapered longitudinally throughout and substantially fluted intermediate the portions 7 and 10 'respectively, so as to present the outer convexed surfaces 12 00 sage which are adapted to be engaged by the locking surface of the nut when the latter is operatively screwed'upon the bolt. The pressure of the nut which will be brought to bear against the surfaces 12 will operate to bend the washer, so as to cause effective positive engagement of the tooth 10 in the receiving recesses 11 in the nut. By constructing the washer as just described, its elasticity is greatly increased and its engagement with the nut and with the object against which it is associated will be such that it'will be positively held against movement about the bolt.

From the construction described it will be seen that the nut may be threaded onto the bolt in the usual manner. Its movement will gradually be retarded when it contacts with the free spring portion of the-washerplate and when the limit of adjustment of the nut has been obtained the tooth portion 10 of the washer-plate will be effectively engaged with the nut to hold it against rota- 'tion in one direction. and long I claim:--- v 1. A nut l'ock comprising a threaded bolt,

"a nut adjustably mounted on the bolt and provided With a circular series of oppositely curved surfaces, and a substantially spiral Washer-plate of spring material having one end formed to provide an anchoring portion and having its opposite end formed to pro- I vide oppositely curved surfaces conforming substantially in configuration with the inner surfaces of the nut and having locking engagement therewith to hold the nut against rotation on the bolt in one direction.

2. In a nut look, a? bolt, an adjustable nut thereon, the said nut being formed on its inner face to provide a series of curved sur- -faces, the surfaces being formed so as to a present on the inner face of the nut an annular series of recesses, and a spring washerplate removably mounted on the bolt at one sideof the nut and having a spring free portion formed to provide a tooth for interchangeable locking engagement with the recesses on the inner face of the nut 'and formed to provide oppositely curved surfaces for frictionally contacting with the said curved surfaces on the inner face of the nut.

3. In a nut look, a bolt, an adjustable nut thereon, the said nut belng formed on its inner face to provide a series of curved surfaces, the surfaces being formed so as to present on the inner face of the nut an annular series of recesses, and a spring washer-plate removably mounted on the bolt 'at one side of the nut and having a spring free portion formed to provide a tooth for interchangeable locking enga ement With the recesses on the inner face 0 the nut and formed to provide oppositely curved surfaces for frictionally contacting with the said curved surfaces on the inner face of the nut, the said washer-plate having its opposite end formed to provide an anchoring 

